| 摘要 |
PROBLEM TO BE SOLVED: To provide a road sign device capable of efficiently and simply preventing snow cover at an inexpensive maintenance cost without producing any ice pillar. SOLUTION: The road sign device is provided with a road sign plate 1, a nozzle 4 spraying the air on the surface of the road sign plate 1, a blower 2 supplying the air to the nozzle, and an electrical motor device driving the blower. The nozzle 4 is mounted on a part of at least the outer periphery of the road sign plate 1, and snow is blown off by the air jetted from the nozzle immediately before snow pieces falling on the road sign plate is adhered thereto. |
